Phonograph



' Nov. 6, 1923.

J. W. BISHOP PHONOGRAPH Filed Oct. 17. 1921 \m v QM mm MM Patented Nov.6, 1923.

UNITED I STATES PATENT oFFicE.

JOSEPH W. BISHOP, F MUSKEGON, MICHIGAN, ASSIGNOR TO BRUNSWICK-BALKE'COIILENDER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELA-WARE.

PKONOGKAPH.

Application filed October 17, 1921.

To all whom it may concern:

Be it known that I, Josnrrr W. BISHOP, a citizen of the United States,residing at Muskegon in the countyof Muskegon and State of Michigan,have invented certain new and useful Improvements in Phonographs, ofwhich the following is a specification.

This invention relates to phonographs and one object is to provide aconstruction in which the needle will move along a radius of the recordduring reproduction.

Another object of the invention is to pro-- vide a construction in whichthe customary tone arm and associated connections are eliminated.

-Another object of the invention is to provide a structure in which thesound box can be fixed with respect to the record table.

A still further object of the invention is to provide a constructionwhich will be more compact than is possible with devices incommon use,and which will be less expensive to manufacture.

Further objects of the invention will be come apparent as thedescription is read in connection with'the accompanying drawing showinga selected embodiment of the 'invention in which- Fig. 1 is a plan viewof the device; and

Fig. 2 is a longitudinal section on the line 2-2 of Fig, 1.

Referring to the drawing, is a record table adapted to receive a record11 and which may be rotated by the usual or any other suitablemechanism; The spindle 12 on which the table is mounted projects througha top plate 13 resting on a motor board 14. The sound box 15 is mountedon the top plate and secured thereto by the screws 16 or other suitablemeans. A tubular extension 17 on the sound box is equipped with theproper passage 18 and extends through the top plate and the motor boardinto communicative relation with the amplifier 19. The diaphragm 20 maybe mounted in the sound box in any suitable manner. As I have shown it,the periphery is clamped between two yielding tubes 21; and a ring 22secured in place by the screws 23 serves to-clamp the rings 21 againstthe diaphragm he body of the sound box is provided with a pair of ears24 to which a yoke 25 is pivoted on an axis at right angles to SerialNo. 508,311.

the radius of the record table which intersects the axis of the soundbox. A pair of guide bars 26 are attached to the yoke 25 and areconnected at their free ends by a cross head 27 adjustably securedthereon by the nuts 28 and 29. A carriage 30 comprising a U-shaped body31 has tubular bearings 32 slidably mounted on the guide rods 26. Aspring 33 secured to the top of the carriage b screws 34 carries at itsfree end a need e support 35 in which the needle 36 may be secured by ascrew 37. The needle support 35 is equipped with a relatively longtubular bearing portion 38 adapted to receive a rod or wire 39 havingone end'slidably supported in a bearing 40 in the cross head 27, and itsother end connected with one arm 42 of a bell crank lever 43 having itsotherarm 44 connected with with the diaphragm 20. The bearing 38 isreferably made of wood or similar material, while the rod is made ofmetal. The

axis of the pivot 45 is co-incident with the axis about which the yoke25 swings. As

shown, the rod 39 is equipped at its end adjacent to the bell crank 43with a nipple 46, one end of which lies in a passage 47 in the yoke 25,and the other end is connected to the arm 42 by a pair of screws 48. Thebell crank lever 43 is pivoted to a pair of cars 49 by screws 50.

In operation, the frame comprising the guides 26, the cross head 27, andthe yoke 25 is raised slightly, and the carriage 31 moved along theguides 26 until the needle can be lowered onto the record at the outerportion of the record groove. The friction between the carriage and theguides, and between the bearing 38 and the rod 39 is very small, and therecord groove acting upon the needle 36 will move the carriage andneedle support along a straight line,

toward the center of the record table. The

vibrations of the needle will cause the hearing 38 to bind on the rod 39sufiiciently to transmit the vibrations through the bell crank lever 43to the diaphragm 20 from which the sound waves proceed in the usualmanner throu h the tubular extension 17 needle can be made very cheaplyand will require much less room than the tone arm of the usualconstruction. Furthermore, the needle traveling along a straight linecoincident with the radius of the record table will co-act with therecord in much the same manner-as -the recording needle which made therecord.

'I am aware that changes in the form and proportion of parts, and in-thedetails of construction of my invention may be made without departingfrom the spirit or sacrificing any of the advantages thereof, and Ireserve the right to make all such changes as fairly fall within thescope of the following claims.

I claim:

1. In a device of the class described, a stationary sound box having adiaphragm therein, a rotatable record table, a needle adapted to travelalong a radius of said table, and an operative connection between saidneedle and said diaphragm.

2. In a device of the class described, a stationary sound box having adiaphragm therein, a rotatable record table, a needle adapted to travelalong a radius bf said table, a guide for said needle pivoted on an axisat right angles to said radius, and an operative connection between saidneedle and said diaphragm.

3. In a device of the class described, a stationary sound box having adiaphragm therein a rotating record table, a needle adapted to movealong a radius of said table, a guide pivoted on an axis at right anglesto said radius, a needle support carried by said guide, and meansslidably en gaged by said needle support for o-peratively connectingsaid needle with said diaphragm.

4. In a device of the class described; a stationary sound box having adiaphragm therein, a rotating record table, a needle adapted to movealong a radius of said record table lying in the same plane as the axisof the sound box, a guide pivoted on an axis at right angles to saidradius, a needle support slidably engaged with said guide,

' and means connected with said diaphragm and slidably engaged by saidneedle support for operatively connecting said needle and saiddiaphragm.

5. In a device of the class described, a fixed sound box having adiaphragm therein, a rotating record table, a needle adapted to travelalong a radius of said table, a guide pivoted on an axis at right-anglesto saidradius, a needle support slida-bly mounted. on said guide, and arod operatively connected with said diaphragm and operably engaged bysaid needle support.

means connected to said diaphragm and operatively engaged by saidneedle.

8. In a device of the class described, a stationary sound box having adiaphragm therein, a rotating record table, a needle adapted to movealong a radius of said table, a guide pivoted on an axis at right-anglesto said radius, a needle support carried by said guide, and an operativeconnection between said needle and said diaphragm.

9. In a device of the class described, a stationary sound box having adiaphragm therein, a rotating record table, a needle adapted to movealong a radius of said record table lying in the same plane as the axisof the sound box, a guide pivoted on an axis at right angles to saidradius, a needle support slidably engaged with said guide, and anoperative connection between) said needle and said diaphragm.

10. In a device of the class described, a stationary sound box having adiaphragm therein, a rotatablerecord table, a traveling needle, asupport for the needle. a guide for the support, and an operativeengagement between said needle and diaphragm.

